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Mono 158.75mm 5BB Bifacial Solar Cell

158.75mm PERC solar cell
Monofacial PERC G1 Solar Cell

Mono 158.75mm 5BB Bifacial Solar Cell

  • Dimensions :

    158.75mm x 158.75mm ± 0.25mm
  • Thickness :

    190μm ± 30μm
  • Front (-) :

    5 bus bars (silver), width 0.7mm, 106 finger grids, Blue anti-reflecting coating(silicon nitride)
  • Back (+) :

    Wide soldering pads (silver)1.8mm, 5 bus bars (aluminum), 160 finger grids(aluminum), Blue anti-reflecting coating (silicon nitride)

   

What is PERC Technology?

     PERC means Passivated Emitter and Rear Contact or Passivated Emitter and Rear Cell .

   Traditional cells saw jumps in efficiency when panel manufacturers began putting a front passivation layer to prevent electron recombination at the front panel. Additional bumps in efficiency were achievable by reducing the number of electrons that hit the rear of the panel.

    PERC cells take this one step further by placing an additional capping and passivation layer on the rear surface of the photovoltaic (PV) panels, thereby reducing back-side recombination. These layers also help prevent the panels from heating up from unreflected solar radiation. Since panels perform better in cooler temperatures, this helps boost performance as well. PERC cells work in a similar manner but with a few key differences.

    The n-type sheet, which is negatively charged, typically contains more atoms that have an additional electron in their outer shell — like phosphorus — to maintain that negative charge.

    The positive p-type sheet contains positively charged holes into which those additional electrons can fit. These are usually boron or gallium, which lack one valence electron needed to bond with the silicon around it.

    The atoms missing an outer electron — the holes — naturally bond with the atoms that have an extra valence electron. This leaves one additional electron out of the bond, which then gets discharged and collected as electricity.

   When solar energy enters the panel, the positive and negative silicon layers naturally rebalance, and the process begins again. While the underlying idea is the same, PERC cells have a few additional layers to prevent the loss of electrons to the outside world.

           

 

 

                       Engineering Drawing (mm ) 

                       

 

 

 

                                 Spectral Respomse(SR)                                                                                          

                     

                      

 

                              IV Curve

               

                           

 

 

                       Light intensity reliability

 Intensity(W/m²)

1000

900

800

600

400

Voc

1.0 0.99 0.99 0.98 0.96

Isc

1.0 0.9 0.8 0.6 0.4
* Taking the Voc(Isc) tested at 1000W/m² as the standard, test the decrease of Voc (Isc) with the light intensity.

 

                                                                          

 

                        Front Electrical performance distribution      

EFF Code(%) Pmpp(W) Vmpp(V) Impp(A) Voc(V)       Isc(A)
22.6% 5.69 0.579 9.835 0.683       10.390
22.5% 5.66 0.577 9.815 0.682       10.388
22.4% 5.64 0.576 9.807 0.680       10.370
22.3% 5.62 0.574 9.792 0.679       10.344
22.2% 5.59 0.571 9.792 0.678       10.334
22.1% 5.57 0.569 9.792 0.677       10.333
22.0% 5.54 0.568 9.759 0.677       10.313
21.9% 5.52 0.567 9.728 0.676       10.290
21.8% 5.49 0.567 9.693 0.675       10.254
21.7% 5.47 0.564 9.693 0.674       10.226
21.6% 5.44 0.563 9.658 0.671       10.221
21.5% 5.42 0.561 9.654 0.669       10.209
21.4% 5.39 0.558 9.663 0.667       10.195
21.3% 5.37 0.557 9.640 0.665       10.174

             

 

         

                       Back Electrical performance distribution           

Efficiency (%) Pmpp(W) Vmpp(V) Impp(A) Voc(V)       Isc(A)
>17.0% 4.30 0.571 7.519 0.671 7.877
16.5%-17.0% 4.22 0.570 7.407 0.671 7.746
16.0%-16.5% 4.10 0.568 7.225 0.666 7.590
<16.0% 4.00 0.564 7.083 0.658 7.518

 

                

                    Temperature Coefficient

TkVoltage   -0.36%/K
TKCurrent   +0.06%/K
TkPower   -0.36%/K

 

                   Standard test conditions:1000W/m², AM1.5, 25. The above technical parameters are subject to technical changes and tests.

                   All data contained in this datasheet is subject to change without notice.

                    

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